Heat dissipating device and heat dissipating fin

ABSTRACT

A heat dissipating device includes a heat dissipating fin and a heat pipe. The heat dissipating fin includes a fin body, a through hole, a first arc-shaped portion and a second arc-shaped portion. The through hole is formed on the fin body and has a central line. The first arc-shaped portion extends from the through hole in a first direction and the second arc-shaped portion extends from the through hole in a second direction, wherein the first direction is opposite to the second direction. The first arc-shaped portion and the second arc-shaped portion are located at opposite sides of the central line. The heat pipe is disposed in the through hole.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a heat dissipating device and a heatdissipating fin and, more particularly, to a heat dissipating fin havingtwo arc-shaped portions located at opposite sides of a through hole anda heat dissipating device equipped with the heat dissipating fin.

2. Description of the Prior Art

Heat dissipating device is a significant component for electronicproducts. When an electronic product is operating, the current incircuit will generate unnecessary heat due to impedance. If the heat isaccumulated in the electronic components of the electronic productwithout dissipating immediately, the electronic components may getdamage due to the accumulated heat. Therefore, the performance of heatdissipating device is a significant issue for the electronic product.

So far the heat dissipating device used in the electronic productusually consists of a heat pipe, a heat dissipating fin and a heatdissipating fan, wherein one end of the heat pipe contacts theelectronic component, which generates heat during operation, the otherend of the heat pipe is connected to the heat dissipating fin, and theheat dissipating fan blows air to the heat dissipating fin, so as todissipate heat. In the prior art, there are two methods for connectingthe heat pipe and the heat dissipating fin, as follows. The first methodis to fix the heat pipe in a through hole of the heat dissipating findirectly in a tight-fitting manner. However, when the heat pipe isinserted into the through hole by the first method, the heat pipe andthe heat dissipating fin may pull and drag each other, such that asurface of the heat pipe may be scratched, the heat dissipating fin maydeform or the through hole may crack. Accordingly, the yield rate of thefirst method is low. The second method is to connect the heat pipe andthe through hole of the heat dissipating fin in a loose-fitting manner,wherein a thermal conductive adhesive or a solder paste is filled in agap between the heat pipe and the heat dissipating fin. The secondmethod has to form a groove on each of the heat dissipating fins tocommunicate with the through holes and then fill the thermal conductiveadhesive or the solder paste in the groove. Afterward, the heat pipe isinserted into the through hole. Then, the thermal conductive adhesive orthe solder paste are heated to be converted form solid into liquid andthen cooled to be converted form liquid into solid, such that thethermal conductive adhesive or the solder paste is filled in the gapbetween the heat pipe and the heat dissipating fin. However, the processof the second method is complicated and additional thermal conductiveadhesive or solder paste may be remained on the heat dissipating fin,such that the appearance is not good and the thermal impedance increasesaccordingly. Furthermore, the manufacturing time is long, so themanufacturing efficiency is low.

SUMMARY OF THE INVENTION

The invention provides a heat dissipating fin having two arc-shapedportions located at opposite sides of a through hole and a heatdissipating device equipped with the heat dissipating fin, so as tosolve the aforesaid problems.

According to an embodiment of the invention, a heat dissipating devicecomprises a heat dissipating fin and a heat pipe. The heat dissipatingfin comprises a fin body, a through hole, a first arc-shaped portion anda second arc-shaped portion. The through hole is formed on the fin bodyand has a central line. The first arc-shaped portion extends from thethrough hole in a first direction and the second arc-shaped portionextends from the through hole in a second direction, wherein the firstdirection is opposite to the second direction. The first arc-shapedportion and the second arc-shaped portion are located at opposite sidesof the central line. The heat pipe is disposed in the through hole.

According to another embodiment of the invention, a heat dissipating fincomprises a fin body, a through hole, a first arc-shaped portion and asecond arc-shaped portion. The through hole is formed on the fin bodyand has a central line. The first arc-shaped portion extends from thethrough hole in a first direction and the second arc-shaped portionextends from the through hole in a second direction, wherein the firstdirection is opposite to the second direction. The first arc-shapedportion and the second arc-shaped portion are located at opposite sidesof the central line.

As mentioned in the above, the invention forms two arc-shaped portionsat opposite sides of the through hole of the heat dissipating fin. Anoperator may insert the heat pipe into the through hole of the heatdissipating fin and then punch the two arc-shaped portions at oppositesides of the through hole. After punching the two arc-shaped portions,the two arc-shaped portions fix the heat pipe in a tight-fitting manner.Accordingly, the invention can connect the heat pipe and the heatdissipating fin tightly and improve the yield rate and the efficiency ofmanufacturing the heat dissipating device.

These and other objectives of the present invention will no doubt becomeobvious to those of ordinary skill in the art after reading thefollowing detailed description of the preferred embodiment that isillustrated in the various figures and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view illustrating a heat dissipating deviceaccording to an embodiment of the invention.

FIG. 2 is a perspective view illustrating the heat dissipating deviceshown in FIG. 1 from another viewing angle.

FIG. 3 is a perspective view illustrating the heat dissipating fin shownin FIG. 1.

FIG. 4 is a perspective view illustrating the heat dissipating fin shownin FIG. 3 from another viewing angle.

DETAILED DESCRIPTION

Referring to FIGS. 1 to 4, FIG. 1 is a perspective view illustrating aheat dissipating device 1 according to an embodiment of the invention,FIG. 2 is a perspective view illustrating the heat dissipating device 1shown in FIG. 1 from another viewing angle, FIG. 3 is a perspective viewillustrating the heat dissipating fin 10 shown in FIG. 1, and FIG. 4 isa perspective view illustrating the heat dissipating fin 10 shown inFIG. 3 from another viewing angle.

As shown in FIGS. 1 and 2, the heat dissipating device 1 of theinvention comprises a plurality of heat dissipating fins 10, a pluralityof heat pipes 12 and a base 14, wherein the number of the heatdissipating fins 10 and the number of the heat pipes 12 can bedetermined according to practical applications and are not limited tothe embodiment shown in FIGS. 1 and 2. The heat dissipating fin 10comprises a fin body 100, a plurality of through holes 102, a pluralityof first arc-shaped portions 104 and a plurality of second arc-shapedportions 106, wherein the number of the through holes 102, the number ofthe first arc-shaped portions 104 and the number of the secondarc-shaped portions 106 can be determined according to the number of theheat pipes 12 and are not limited to the embodiment shown in FIGS. 1 and2.

As shown in FIGS. 3 and 4, the through hole 102 is formed on the finbody 100 and has a central line C. The first arc-shaped portion 104extends from the through hole 102 in a first direction D1 and the secondarc-shaped portion 106 extends from the through hole 102 in a seconddirection D2, wherein the first direction D1 is opposite to the seconddirection D2. In other words, the first arc-shaped portion 104 and thesecond arc-shaped portion 106 are formed at opposite sides of thethrough hole 102. Furthermore, the first arc-shaped portion 104 and thesecond arc-shaped portion 106 are located at opposite sides of thecentral line C.

The heat pipe 12 has a heat dissipating end 120 and a heat absorbing end122, wherein the heat dissipating end 120 is opposite to the heatabsorbing end 122. It should be noted that the structure and theprinciple of the heat pipe 12 are well known by one skilled in the art,so the related explanation will not be depicted herein.

To assemble the heat dissipating device 1, an operator may fix the heatdissipating fins 10 on the base 14 by welding, engaging or other mannersfirst. Afterward, the operator may insert the heat dissipating end 120of the heat pipe 12 into the through hole 102 of the heat dissipatingfin 10 and fix the heat absorbing end 122 of the heat pipe 12 on thebase 14 by welding, engaging or other manners . Then, the operator maypunch the first arc-shaped portion 104 and the second arc-shaped portion106 formed at opposite sides of the through hole 102. After punching thefirst arc-shaped portion 104 and the second arc-shaped portion 106, thefirst arc-shaped portion 104 and the second arc-shaped portion 106 fixthe heat pipe 12 in a tight-fitting manner. Accordingly, the inventioncan connect the heat pipe 12 and the heat dissipating fin 10 tightly andimprove the yield rate and the efficiency of manufacturing the heatdissipating device 1.

In this embodiment, a radian of the first arc-shaped portion 104 and aradian of the second arc-shaped portion 106 both may be between 15degrees and 345 degrees. Preferably, the radian of the first arc-shapedportion 104 and the radian of the second arc-shaped portion 106 both maybe 180 degrees. In other words, the first arc-shaped portion 104 and thesecond arc-shaped portion 106 both may be semi-circles, such that thefirst arc-shaped portion 104 and the second arc-shaped portion 106 mayclamp the heat pipe 12 more tightly after the punching process. Itshould be noted that the radian of the first arc-shaped portion 104 maybe identical to or different from the radian of the second arc-shapedportion 106 according to practical applications. In practicalapplications, the through hole 102, the first arc-shaped portion 104 andthe second arc-shaped portion 106 may be formed by punching the fin body100.

Furthermore, the first arc-shaped portion 104 and the second arc-shapedportion 106 may be symmetrically located at opposite sides of thecentral line C of the through hole 102, such that the first arc-shapedportion 104 and the second arc-shaped portion 106 may clamp the heatpipe 12 more tightly after the punching process. It should be noted thatthe first arc-shaped portion 104 and the second arc-shaped portion 106may be asymmetrically located at opposite sides of the central line C ofthe through hole 102 according to practical applications.

As mentioned in the above, the invention forms two arc-shaped portionsat opposite sides of the through hole of the heat dissipating fin. Anoperator may insert the heat pipe into the through hole of the heatdissipating fin and then punch the two arc-shaped portions at oppositesides of the through hole. After punching the two arc-shaped portions,the two arc-shaped portions fix the heat pipe in a tight-fitting manner.Accordingly, the invention can connect the heat pipe and the heatdissipating fin tightly and improve the yield rate and the efficiency ofmanufacturing the heat dissipating device.

Those skilled in the art will readily observe that numerousmodifications and alterations of the device and method may be made whileretaining the teachings of the invention. Accordingly, the abovedisclosure should be construed as limited only by the metes and boundsof the appended claims.

What is claimed is:
 1. A heat dissipating device comprising: a heat dissipating fin comprising a fin body, a through hole, a first arc-shaped portion and a second arc-shaped portion, the through hole being formed on the fin body and having a central line, the first arc-shaped portion extending from the through hole in a first direction, the second arc-shaped portion extending from the through hole in a second direction, the first direction being opposite to the second direction, the first arc-shaped portion and the second arc-shaped portion being located at opposite sides of the central line; and a heat pipe disposed in the through hole.
 2. The heat dissipating device of claim 1, wherein a radian of the first arc-shaped portion and a radian of the second arc-shaped portion both are between 15 degrees and 345 degrees.
 3. The heat dissipating device of claim 1, wherein the first arc-shaped portion and the second arc-shaped portion are symmetrically located at opposite sides of the central line.
 4. The heat dissipating device of claim 1, further comprising a base, the heat dissipating fin being disposed on the base, the heat pipe having a heat dissipating end and a heat absorbing end, the heat dissipating end being opposite to the heat absorbing end, the heat dissipating end being disposed in the through hole, the heat absorbing end being fixed on the base.
 5. A heat dissipating fin comprising: a fin body; a through hole formed on the fin body and having a central line; a first arc-shaped portion extending from the through hole in a first direction; and a second arc-shaped portion extending from the through hole in a second direction, the first direction being opposite to the second direction, the first arc-shaped portion and the second arc-shaped portion being located at opposite sides of the central line.
 6. The heat dissipating fin of claim 5, wherein a radian of the first arc-shaped portion and a radian of the second arc-shaped portion both are between 15 degrees and 345 degrees.
 7. The heat dissipating fin of claim 5, wherein the first arc-shaped portion and the second arc-shaped portion are symmetrically located at opposite sides of the central line. 